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i <br /> • s <br /> now <br /> TABLE I GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH _ _ Concentration (pg1L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet ms1) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW8 03/03/98 645 <100* <br /> 05/20/98 13 36 -691 000 71 200 2,000 4,600 31,000 <125 <br /> 05/20/98 43* <br /> 08/19/98 1491 -846 000 77 1,300 2,300 7,800 31,000 310 <br /> 08/19/98 <100* <br /> 11/18/98 15 15 -870 000 38 220 2,900 7,100 27,000 <125 <br /> 03/30/99 13 30 -685 000 -- -- _- __ <br /> 05/05/99 13 67 -722 000 188 78 9 1,580 3,000 19,100 461 <br /> 08/20/99 15 15 -870 000 __ -_ __ -- <br /> 12/06/99 15 25 -880 000 -- -- -- -- <br /> 02/29/00 1276 -631 000 31 110 1,100 2,330 10,000 42 <br /> 05/16/00 1297 -652 000 -- -- -- <br /> 09/11/00 <br /> -09111/00 -- -- -- -- -- -- -- -- <br /> 12/13/00 15.20 -875 000 31 11 410 3675 4,200 37 <br /> 12/13/00 22* <br /> MW9 04/11/88 7 88 2081 -1293 000 <50 <50 <50 <50 2,100 -- <br /> 09/13/88 23 14 -1526 000 85 67 100 90 35,000 -- <br /> 11/16/88 2324 -15 36 000 70 12 14 19 2,200 -- <br /> 02/09/89 2279 -1491 000 12 16 4 1 3 4 800 -- <br /> 05/31/89 2447 -1659 000 14 <0 5 1 2 13 540 -- <br /> 08/17/89 2605 -18 17 000 5 <0 5 2 <0 5 <250 <br /> 12/19/89 2697 -1909 000 66 1 1 <0 5 12 470 -- <br /> 03/21/90 2745 -1957 000 8 4 10 2 1 3 7 160 -- <br /> 05/17/90 2823 -2035 000 2 0 093 089 <0 5 120 -- <br /> 09/25/90 Dry __ __ __ _- <br /> 12/19/90 2933 -2145 000 <br /> f1projects1734421masleAm p1g120013942gw x1s <br /> Page 15 of 43 <br />